Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21809d2833892b9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-29 22:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad0f77d8e0104422997a8a76f5646920 SHA-1: e21469b63589192ff5f72e1dc223c974a979339f SHA-256: d21809d2833892b94cee3f862484e775ba56dd9a7ee8f41d5deed8156f447b14
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a keyword related to food. The document also features a large number of embedded links to shopify.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=carbs+in+country+fried+steak
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/tamizupovopawikate.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/yahoo_messenger_conversation_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/dobelebijisafabadozuvu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/76047450345.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/36608119260.pdf
    • https://cdn.shopify.com/s/files/1/0430/8497/2183/files/newspaper_ad_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7191/files/lopapofiwaruwaxowuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1349/files/sign_guidelines_stable_angina.pdf
    • https://cdn.shopify.com/s/files/1/0440/8839/3893/files/irem_derici_kalbimin_tek_sahibi_indir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8038/files/autoliberacion_interior_frases.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/sukote.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574b.bin
28bfecdda421d14fad934cf8da70317bb838fbc89f3bebf5026c571963c5eb02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574B 5196 bytes
font_01_sfnt_off0000690a.bin
1af9d28a1d07c8f077d1cf3e693fb63f656f15593c2e4d6dc98e0c95b4a1d4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690A 13916 bytes

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